Ok so I can't comment on the clomid as haven't used it, however I can say that possibly you would have missed your surge hence not getting a positive opk, for some ladies there's only a 6-12 hour period that a opk would be a positive, if the ewcm started two days ago and you've had paid these last two days id say you ovulated, when I ovulate and have sex it generally hurts too! Feels very deep!! You could also not have had your surge so my advice is to keep testing on the opk's twice a day for the next 7 days and upload the photos and we will help
I ALWAYS ovulate on the 13/14 day of my cycle but this cycle I ovulated 19/20th day and have got my bfp! Had i done the estimated opk testing between cd11/cd16 I would of completely missed my ovulation which was 5 days later than normal! Keep us posted! Also never use fmu! Xxx